The post is about the SoP being full of games from Japan / China so if they already knew the name or did their research, it adds another layer of "validity" to help try and sell it.
Either way, it's full of a lot of easy guesses from things that have actually leaked (Horizon Remaster), things included from other unverified leaks (Gravity Rush), and then things that are obvious to be included as well (Lego Horizon, Death Stranding, Silent Hill 2). We'll know for sure whether or not how legit it is when either the first game not on that list is shown.
They claim it's 50 minutes long which is a lot longer than the 30+ minutes advertised. There's also no mention of what is on PSVR2, and we know the show will have VR games in it. If Xbox, PC and Mobile makes it into the console list for a SoP, then VR should have too.